CA2374673A1 - Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity - Google Patents

Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity Download PDF

Info

Publication number
CA2374673A1
CA2374673A1 CA002374673A CA2374673A CA2374673A1 CA 2374673 A1 CA2374673 A1 CA 2374673A1 CA 002374673 A CA002374673 A CA 002374673A CA 2374673 A CA2374673 A CA 2374673A CA 2374673 A1 CA2374673 A1 CA 2374673A1
Authority
CA
Canada
Prior art keywords
pulp
opacity
acid
bleaching
aliphatic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002374673A
Other languages
English (en)
French (fr)
Inventor
Aarto Paren
Jukka Jakara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kemira Oyj
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2374673A1 publication Critical patent/CA2374673A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
CA002374673A 1999-06-15 2000-06-14 Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity Abandoned CA2374673A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI991366A FI107545B (fi) 1999-06-15 1999-06-15 Menetelmä mekaanisten massojen käsittelemiseksi
FI991366 1999-06-15
PCT/FI2000/000532 WO2000077301A1 (en) 1999-06-15 2000-06-14 Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity

Publications (1)

Publication Number Publication Date
CA2374673A1 true CA2374673A1 (en) 2000-12-21

Family

ID=8554886

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002374673A Abandoned CA2374673A1 (en) 1999-06-15 2000-06-14 Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity

Country Status (9)

Country Link
EP (1) EP1244851B1 (no)
AT (1) ATE239828T1 (no)
AU (1) AU5224500A (no)
CA (1) CA2374673A1 (no)
DE (1) DE60002613T2 (no)
ES (1) ES2193085T3 (no)
FI (1) FI107545B (no)
NO (1) NO20016083L (no)
WO (1) WO2000077301A1 (no)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI111745B (fi) 2001-12-19 2003-09-15 Kemira Chemicals Oy Parannettu kartonginvalmistusmenetelmä
GB2391011A (en) * 2002-07-19 2004-01-28 Crosmill Ltd Bleaching cellulose suspensions
KR101231131B1 (ko) 2008-07-30 2013-02-07 마이크로 모우션, 인코포레이티드 펄스 폭 변조 신호 처리를 위한 방법 및 장치
FI127444B (en) 2015-05-27 2018-06-15 Kemira Oyj A method for reducing the viscosity of a pulp in the manufacture of soluble cellulose
FI127996B (en) * 2016-07-01 2019-07-15 Kemira Oyj Process for treating cellulose
WO2019048698A1 (en) * 2017-09-11 2019-03-14 Kemira Oyj PROCESS FOR TREATING PULP

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1119546A (en) * 1965-03-01 1968-07-10 Paper Chemistry Inst Improved method of treating fibrous material
US5589032A (en) * 1992-09-21 1996-12-31 North Carolina State University Process for preparing a bleaching liquor containing percarboxylic acid and caro's acid
AU4271596A (en) * 1995-12-19 1997-07-14 Kvaerner Hymac Inc. Process for treating refiner pulp

Also Published As

Publication number Publication date
NO20016083D0 (no) 2001-12-13
AU5224500A (en) 2001-01-02
EP1244851B1 (en) 2003-05-07
NO20016083L (no) 2002-02-14
ES2193085T3 (es) 2003-11-01
DE60002613D1 (de) 2003-06-12
WO2000077301A1 (en) 2000-12-21
DE60002613T2 (de) 2003-11-27
EP1244851A1 (en) 2002-10-02
FI991366A (fi) 2000-12-16
FI991366A0 (fi) 1999-06-15
FI107545B (fi) 2001-08-31
ATE239828T1 (de) 2003-05-15

Similar Documents

Publication Publication Date Title
CA2315063C (en) Bleaching of chemical pulp with peracid
CA2808240C (en) High brightness pulps from lignin rich waste papers
CA2251664A1 (en) Method for bleaching of lignocellulosic fibers
US20010025695A1 (en) Method for the delignification of fibrous material and use of catalyst
BR9201554A (pt) Processo para a deslignificacao e alvejamento de polpa contendo ligno-celulose quimicamente digerida
CA2562026A1 (en) Methods to enhance brightness of pulp and optimize use of bleaching chemicals
AU666375B2 (en) Process for the delignification of a chemical paper pulp
US5639348A (en) Bleaching compositions comprising sulfamates and borates or gluconates and processes
US5589032A (en) Process for preparing a bleaching liquor containing percarboxylic acid and caro's acid
EP1244851B1 (en) Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity
CA2414637C (en) Improved process for manufacturing board
CA2512141C (en) Bleaching of cellulosic fibre material with peroxide using polymers as a stabiliser
FI105214B (fi) Tehostettu kemiallisen massan valkaisumenetelmä
EP1244842B1 (en) A peroxide bleaching solution comprising a bleaching activator and method for using the activator
CA2189724A1 (en) Method of pulping
CA2230315A1 (en) Process for increasing mechanical wood pulp brightness in a refiner
M Hassan Oxygen-peroxide (Eop) delignification and peroxide (P) bleaching of bagasse kraft pulp
US5645688A (en) Bleaching compositions and processes employing sulfamates and polyaminocarboxylic acids
Depew et al. BLEACHING MECHANICAL PULPS WITH H [sub2] O [sub2]: A UNIQUE ALKALI-FREE APPROACH.
Saha et al. Additives for increased lignin removal efficiency in oxygen delignification
Yousef Kraft bagasse pulp delignification with dimethyldioxirane

Legal Events

Date Code Title Description
FZDE Discontinued